The McKenzie County Sheriff's Department is awaiting autopsy results on two recent deaths of oil workers from out of state.

Sheriff Ron Rankin said both men died at the scene —one from burns sustained at an oil well and the other from unknown and possible health reasons.

Jesus Castillo, 60, of Santa Fe, N.M., died Monday at an oil well site near Mandaree from burns sustained while repairing a leak at the well.

Rankin said Castillo and two others were working for K & R Roustabout of Killdeer on a well operated by William Paul XEnergy, of Williston.

The roustabouts told the investigating deputy that Castillo went to retrieve more tools and when he didn’t return, they searched, saw smoke and fire near the tank batteries and found him already engulfed in flames. The co-workers used a fire extinguisher and summoned emergency response.

The report said all three workers were covered in oil.

Rankin said Castillo’s body was sent for autopsy, but no foul play is suspected.

The death of another oil field worker — Arthur B. Weyrauch, 59, of Wolf Point, Mont. — was reported by four other oil field workers at 11 p.m. Oct. 20.

Rankin said the men were playing cards in a heated barn north of Alexander, when Weyrauch told the others he wanted to lie down for a while.

Later, friends noticed he wasn't breathing and attempted life-saving measures.

He was pronounced dead at the scene when emergency responders and the county coroner arrived, Rankin said.

The Castillo incident has been turned over to the federal Occupational Safety and Health Administration, Rankin said.

Reach reporter Lauren Donovan at 701-220-5511 or